IEC 61204-7-2016 Low-voltage switch mode power supplies - Part 7 Safety requirements《低压开关电源.第7部分 安全要求》.pdf

1、 IEC 61204-7 Edition 2.0 2016-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switch mode power supplies Part 7: Safety requirements Alimentations dcoupage basse tension Partie 7: Exigences de scurit IEC 61204-7:2016-11(en-fr) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyrigh

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19、 questions contactez-nous: csciec.ch. IEC 61204-7 Edition 2.0 2016-11 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switch mode power supplies Part 7: Safety requirements Alimentations dcoupage basse tension Partie 7: Exigences de scurit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION

20、 ELECTROTECHNIQUE INTERNATIONALE ICS 29.200 ISBN 978-2-8322-3670-3 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veui

21、llez vous assurer que vous avez obtenu cette publication via un distributeur agr. colour inside 2 IEC 61204-7:2016 IEC 2016 CONTENTS FOREWORD . 7 INTRODUCTION . 10 0 Principles of safety 11 0.1 General . 11 0.2 Hazards 12 0.2.1 General . 12 0.2.2 Electric shock 12 0.2.3 Energy related hazards 13 0.2

22、4 Fire 13 0.2.5 Heat related hazards . 14 0.2.6 Mechanical hazards . 14 0.2.7 Chemical hazards 14 0.3 Materials and components 14 1 Scope 15 1.1 Equipment covered by this document 15 1.2 Exclusions 15 1.3 Additional requirements 15 2 Normative references 16 3 Terms and definitions 17 3.100 General

23、 18 4 Protection against hazards 20 4.1 General . 20 4.1.100 Constructions not specifically covered . 21 4.1.101 Orientation during transport and use 21 4.2 Fault and abnormal conditions 21 4.2.100 Application of faults and abnormal conditions 22 4.3 Short circuit and overload protection . 22 4.4 P

24、rotection against electric shock . 23 4.4.1 General . 23 4.4.2 Decisive voltage class . 23 4.4.3 Provision for basic protection . 25 4.4.4 Provision for fault protection 26 4.4.5 Enhanced protection 27 4.4.6 Protective measures 30 4.4.7 Insulation . 31 4.4.8 Compatibility with residual current-opera

25、ted protective devices (RCD) . 37 4.4.9 Capacitor discharge . 37 4.5 Protection against electrical energy hazards . 38 4.5.1 Operator access areas. 38 4.5.2 Service access areas . 38 4.6 Protection against fire and thermal hazards 38 4.6.1 Circuits representing a fire hazard . 38 4.6.2 Components re

26、presenting a fire hazard . 38 4.6.3 Fire enclosures 38 4.6.4 Temperature limits . 40 4.6.5 Limited power sources . 41 IEC 61204-7:2016 IEC 2016 3 4.7 Protection against mechanical hazards . 41 4.7.1 General . 41 4.7.2 Specific requirements for liquid cooled SMPS 41 4.8 Equipment with multiple source

27、s of supply 41 4.9 Protection against environmental stresses 41 4.10 Protection against sonic pressure hazards 41 4.11 Wiring and connections . 41 4.11.1 General . 41 4.11.2 Routing 41 4.11.3 Colour coding 41 4.11.4 Splices and connections 41 4.11.5 Accessible connections . 41 4.11.6 Interconnection

28、s between parts of the SMPS . 42 4.11.7 Supply connections 42 4.11.8 Terminals 42 4.12 Enclosures 42 4.12.1 General . 42 4.12.2 Handles and manual controls . 42 4.12.3 Cast metal . 43 4.12.4 Sheet metal . 43 4.12.5 Stability test for enclosure . 43 5 Test requirements 43 5.1 General . 43 5.1.1 Test

29、objectives and classification . 43 5.1.2 Selection of test samples . 43 5.1.3 Sequence of tests 43 5.1.4 Earthing conditions 43 5.1.5 General conditions for tests . 43 5.1.6 Compliance . 44 5.1.7 Test overview 44 5.2 Test specifications 46 5.2.1 Visual inspections (type test, sample test and routine

30、 test) 46 5.2.2 Mechanical tests 46 5.2.3 Electrical tests . 48 5.2.4 Abnormal operation and simulated faults tests . 56 5.2.5 Material tests . 61 5.2.6 Environmental tests (type tests) . 61 5.2.7 Hydrostatic pressure test (type test and routine test) . 62 6 Information and marking requirements . 62

31、 6.1 General . 62 6.2 Information for selection . 64 6.2.100 Additional marking requirements for SMPS 64 6.2.101 Additional information for Component SMPS . 66 6.3 Information for installation and commissioning 66 6.3.1 General . 66 6.3.2 Mechanical considerations . 66 6.3.3 Environment 66 6.3.4 Han

32、dling and mounting 66 6.3.5 Enclosure temperature. 66 4 IEC 61204-7:2016 IEC 2016 6.3.6 Connections 66 6.3.7 Protection requirements . 67 6.3.8 Commissioning 69 6.4 Information for use 69 6.4.1 General . 69 6.4.2 Adjustment 69 6.4.3 Labels, signs and signals . 69 6.5 Information for maintenance 69 6

33、5.1 General . 69 6.5.2 Capacitor discharge . 69 6.5.3 Auto restart/bypass connection 69 6.5.4 Other hazards 69 6.5.5 Equipment with multiple sources of supply . 69 6.5.100 Disconnect device external to permanently connected equipment 70 6.5.101 Power cord acting as disconnecting device 70 7 Compone

34、nts 70 7.1 General . 70 7.2 Switches . 71 7.2.1 General . 71 7.2.2 Requirements for switches acting as disconnecting device 71 7.2.3 Requirements for switches . 72 7.2.4 Test method and compliance criteria . 73 7.3 Overtemperature protection devices (thermal cut-offs or thermal links) . 73 7.4 PTC t

35、hermistors 74 7.5 Overcurrent protective devices 74 7.6 Protective devices not mentioned in 7.2 to 7.5 74 7.6.1 Other protective devices requirements . 74 7.6.2 Compliance and test method 74 7.7 Transformers 74 7.7.1 General . 74 7.7.2 Insulation . 75 7.8 Motors 76 7.9 Mains supply cords . 76 7.9.1

36、General . 76 7.9.2 Fitting of non-detachable mains supply cords 77 7.10 Surge Protective Devices (SPDs) 79 7.10.1 Use of an SPD connected to reliable earthing 79 7.10.2 Use of an SPD between mains and protective earth . 79 7.10.3 Bridging of supplementary, double or reinforced insulation by a SPD .

37、79 7.10.4 Circuits or components used as transient voltage limiting devices . 79 7.11 Wound components 80 7.12 IC current limiters . 80 7.12.1 General . 80 7.12.2 Test program 1 81 7.12.3 Test program 2 81 7.12.4 Test program 3 81 7.13 Capacitors and RC units bridging insulation 82 7.14 Optocouplers

38、 bridging insulation . 84 7.15 Relays 84 IEC 61204-7:2016 IEC 2016 5 7.16 Electrolytic capacitors . 85 Annex A (normative) Additional information for protection against electric shock . 86 Annex B (informative) Considerations for the reduction of the pollution degree 88 Annex C (informative) Symbols

39、 referred to in IEC 62477-1 89 Annex D (normative) Evaluation of clearance and creepage distances . 90 Annex E (informative) Altitude correction for clearances 91 Annex F (normative) Clearance and creepage distance determination for frequencies greater than 30 kHz 92 Annex G (informative) Cross-sect

40、ions of round conductors 93 Annex H (informative) Guidelines for RCD compatibility . 94 Annex I (informative) Examples of overvoltage category reduction . 95 Annex J (informative) Burn thresholds for touchable surfaces 96 Annex K (informative) Table of electrochemical potentials . 97 Annex L (inform

41、ative) Measuring instrument for touch current measurements 98 Annex M (informative) Test probes for determining access 99 Annex AA (normative) Addition Insulated winding wires for use without interleaved insulation 100 Annex AB (informative) Minimum and maximum cross-section of copper conductors sui

42、table for connection to terminals for external conductors 103 Annex AC (normative) DC power and distribution equipment . 104 Annex AD (informative) Addition Examples of protective measures according to IEC 61204-7 clause 4.4.1 4.4.5 for protection against electrical shock . 119 Bibliography 121 Figu

43、re 100 Electric strength test instrument . 53 Figure 101 Mandrel 54 Figure 102 Initial position of mandrel . 55 Figure 103 Final position of mandrel 55 Figure 104 Position of metal foil on insulating material . 55 Figure 105 Determination of arithmetic average temperature . 60 Figure 106 Detachable

44、mains supply cords and connections 77 Figure AC.100 Resistance and short circuit calculations 107 Table 5 Voltage limits 24 Table 6 Separation requirements for circuit under consideration 25 Table 100 Limits for access of current 29 Table 101 Tests for insulation in non-separable layers . 36 Table 2

45、2 Test overview 45 Table 102 Temperature limits for transformer windings 60 Table 36 Information requirements . 63 Table 103 Component requirements 71 Table 104 Peak surge current 73 Table 105 Strain relief test force 78 Table 106 Capacitor ratings according to IEC 60384-14 . 83 6 IEC 61204-7:2016 I

46、EC 2016 Table C.100 Symbols . 89 Table AA.1 Mandrel diameter . 101 Table AA.2 Oven temperature 101 Table AB.1 Cross-section of copper conductors suitable for connection to terminals for external conductors (extract from IEC 61439-1) . 103 Table AC.101 AC and DC field wiring spacings 111 Table AC.102

47、 Minimum acceptable spacings for uninsulated bus bars . 112 Table AC.103 Temperature limits . 113 Table AC.104 Switch test sequences . 115 IEC 61204-7:2016 IEC 2016 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ LOW-VOLTAGE SWITCH MODE POWER SUPPLIES Part 7: Safety requirements FOREWORD 1) The Intern

48、ational Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electr

49、onic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in th